package com.lm.activiti.boot.datatype;

import com.google.common.collect.Maps;
import org.junit.Test;

import java.util.Map;

/**
 * @author lm_jcf
 * @date 2020/5/6 17:12
 */
public class ConcurrentMapTest {

    @Test
    public void get(){
        Map<String, Integer> map = Maps.newConcurrentMap();

        Integer integer = map.get(null);
        System.out.println(integer);
    }
}
